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Seiko Instruments - BATTERY PROTECTION IC

Numéro de référence S-8254
Description BATTERY PROTECTION IC
Fabricant Seiko Instruments 
Logo Seiko Instruments 





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S-8254 fiche technique
Rev.2.3_00
BATTERY PROTECTION IC
FOR 3-SERIAL OR 4-SERIAL-CELL PACK
S-8254 Series
The S-8254 series is a protection IC for 3-serial or 4-serial cell
lithium ion rechargeable batteries and includes a high-accuracy
voltage detector and delay circuit.
The S-8254 series protects both 3-serial or 4-serial cells using the
SEL pin for switching.
Features
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(1) High-accuracy voltage detection for each cell
Overcharge detection voltage n (n = 1 to 4)
Overcharge release voltage n (n = 1 to 4)
3.9 V to 4.4 V (50 mV steps) Accuracy ±25 mV
3.8 V to 4.4 V*1
Accuracy ±50 mV
*1. Overcharge hysteresis voltage n (n = 1 to 4) can be selected as 0 V or from a range of 0.1 V to 0.4
V in 50 mV steps.
(Overcharge hysteresis voltage = Overcharge detection voltage Overcharge release voltage)
Overdischarge detection voltage n (n = 1 to 4) 2.0 V to 3.0 V (100 mV steps) Accuracy ±80 mV
Overdischarge release voltage n (n = 1 to 4) 2.0 V to 3.4 V*2
Accuracy ±100 mV
*2. Overdischarge hysteresis voltage n (n = 1 to 4) can be selected as 0 V or from a range of 0.2 V to
0.7 V in 100 mV steps.
(Overdischarge hysteresis voltage = Overdischarge release voltage Overdischarge detection
voltage)
(2) Three-level overcurrent protection
Overcurrent detection voltage 1
0.05 V to 0.3 V (50 mV steps) Accuracy ±25 mV
Overcurrent detection voltage 2
0.5 V
Accuracy ±100 mV
Overcurrent detection voltage 3
VC1 1.2 V
Accuracy ±300 mV
(3) Delay times for overcharge detection, overdischarge detection and overcurrent detection 1 can be set by
external capacitors. (Delay times for overcurrent detection 2 and 3 are fixed internally.)
(4) Switchable between a 3-serial cell and 4-serial cell using the SEL pin
(5) Charge/discharge operation can be controlled via the control pins.
(6) Withstanding voltage element
Absolute maximum rating: 26 V
(7) Wide operating voltage range
2 V to 24 V
(8) Wide operating temperature range
40°C to +85 °C
(9) Low current consumption
Operation mode 30 µA max. (+25°C)
Power-down mode 0.1 µA max. (+25°C)
Applications
Lithium-ion rechargeable battery packs
Package
16-Pin TSSOP (Package drawing code: FT016-A)
Seiko Instruments Inc.
1

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